An underground compressed air storage

Abstract

The application relates to the technical field of underground gas storage, and discloses a compressed air underground gas storage, which comprises a gas storage system arranged underground, wherein the gas storage system comprises a central gas storage chamber, a plurality of inner layer gas storage chambers and a plurality of outer layer gas storage chambers arranged around the central gas storage chamber, the central gas storage chamber, the inner layer gas storage chambers and the outer layer gas storage chambers are sequentially communicated through connecting assemblies; a drainage system is arranged for draining underground water; and an inlet and outlet pipeline is arranged at the top of the inner layer gas storage chamber or the central gas storage chamber. The underground gas storage is formed by adopting the multiple gas storage levels composed of the outer layer gas storage chambers, the inner layer gas storage chambers, the central gas storage chamber and the connecting assemblies, so that a flexible and reliable gas storage route is formed; when a single connecting assembly is abnormal, a channel formed by other connecting assemblies can be used to continuously provide a gas exhaust or gas storage route, so that the underground gas storage has high emergency capability and perfect use flexibility.

Description

Technical Field

[0001] This invention relates to the field of underground gas storage technology, specifically to an underground compressed air storage facility. Background Technology

[0002] An underground compressed air storage facility refers to a gas storage system that utilizes underground spaces such as natural caverns, salt caverns, or deep rock pores to store and compress air. The core task in constructing an underground gas storage facility is to ensure the airtightness of the storage facility and the safety of the cavern structure.

[0003] Chinese patent application CN118815542A discloses an underground compressed air storage facility, comprising multiple storage chambers, connecting tunnels, a sealing body, a first vertical shaft, and inlet / outlet pipes. The multiple storage chambers are arranged along the axis of the connecting tunnel on both sides of the tunnel, with the axial direction of the storage chambers intersecting the axis of the connecting tunnel. Adjacent storage chambers on either side of the connecting tunnel are located on opposite sides. While this underground storage facility has multiple storage chambers connected by series-connected inlet / outlet pipes, and its structure is reliable due to the use of geological and concrete materials, resulting in fewer blockages and leaks, the inlet / outlet pipes are susceptible to corrosion and leaks due to material limitations. In emergencies, the entire inlet / outlet pipe system must be shut down for repairs before it can be put back into operation. Therefore, the handling methods for abnormal situations are limited, and the normal supply of compressed air cannot be guaranteed.

[0004] Therefore, it is necessary to provide an underground compressed air storage facility to solve the aforementioned problems existing in the prior art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide an underground compressed air storage facility in which each storage chamber is guaranteed to have a certain degree of independence, thus solving the problem that traditional underground air storage facilities cannot continuously supply energy when the pipeline is abnormal.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An underground compressed air storage facility, comprising:

[0008] An underground gas storage system includes a central gas storage chamber and multiple sets of inner and outer gas storage chambers surrounding the central gas storage chamber. The inner gas storage chambers are located on the side of the outer gas storage chambers closer to the central gas storage chamber. The central gas storage chamber, inner gas storage chambers, and outer gas storage chambers are connected in sequence by connecting components.

[0009] A drainage system, located below the gas storage system, is used to drain groundwater;

[0010] Inlet and outlet pipes are located at the top of the inner gas storage chamber and / or the central gas storage chamber, and are used for the inflow and outflow of gas.

[0011] As a further improvement to the above technical solution:

[0012] Adjacent inner gas storage chambers are connected by connecting components.

[0013] As a further improvement to the above technical solution:

[0014] The inner gas storage cavern and the central gas storage cavern are each provided in six groups, and the horizontal cross-sectional shape of the inner gas storage cavern and the central gas storage cavern is set as a regular hexagon.

[0015] As a further improvement to the above technical solution:

[0016] The outer gas storage chamber is provided in six groups, and the outer sides of the six groups of outer gas storage chambers are arranged in a regular hexagonal pattern.

[0017] As a further improvement to the above technical solution:

[0018] The inner side of each set of outer gas storage chambers is recessed inward to form a cavity for accommodating the inner gas storage chambers, and the inner side of the cavity of each set of outer gas storage chambers is connected to a set of inner gas storage chambers.

[0019] As a further improvement to the above technical solution:

[0020] The inner sides of the six outer gas storage chambers are arranged in a regular hexagonal pattern and can surround all the inner gas storage chambers.

[0021] As a further improvement to the above technical solution:

[0022] The connection assembly includes an outer pipe, a connecting pipe, and an inner pipe that are detachably connected in sequence, and the connecting pipe is equipped with a valve for controlling the opening and closing of the connecting pipe.

[0023] As a further improvement to the above technical solution:

[0024] The drainage system includes an external drainage channel, a radial water channel, and an internal drainage channel. The external drainage channel is arranged around the outside of the outer gas storage cavern, and the internal drainage channel is arranged around the space between the inner gas storage cavern and the outer gas storage cavern. The radial water channel passes through the gap between two adjacent outer gas storage caverns and connects the external drainage channel and the internal drainage channel.

[0025] The radial waterway also extends to the central gas storage chamber.

[0026] As a further improvement to the above technical solution:

[0027] The walls of the inner gas storage cavern, the outer gas storage cavern, and the central gas storage cavern all include a sealing layer, a filling layer, a casting layer, and an outer rock layer arranged sequentially from the inside out.

[0028] The filling layer is filled with elastic columns along the vertical direction. The elastic columns are made of rubber. The casting layer is made of concrete.

[0029] As a further improvement to the above technical solution:

[0030] The inlet and outlet pipes are installed in multiple sets on the inner gas storage chamber.

[0031] Compared with the prior art, the advantages of the present invention are as follows:

[0032] 1. A compressed air underground storage facility of the present invention includes: an underground storage system comprising a central storage chamber and multiple sets of inner and outer storage chambers surrounding the central storage chamber, wherein the inner storage chambers are located on the side of the outer storage chambers closer to the central storage chamber, and the central, inner, and outer storage chambers are sequentially connected by connecting components; a drainage system located below the storage system for draining groundwater; and inlet / outlet pipes located at the top of the inner and / or central storage chambers for gas inflow and outflow. The underground storage facility, by employing multiple storage layers consisting of outer, inner, and central storage chambers and connecting components, forms a flexible and reliable gas storage route. Furthermore, in the event of a single connecting component malfunction, the system can continuously provide exhaust or storage routes using channels formed by other connecting components, exhibiting high emergency response capability and excellent operational flexibility.

[0033] 2. The underground gas storage chamber wall of the present invention adopts a combination of elastic columns, filling layers and cast-in-place layers, which can provide a certain degree of deformability and buffering capacity, making the constructed underground gas storage safe and reliable. Attached Figure Description

[0034] Figure 1 This is a top view of an underground compressed air storage facility according to an embodiment of the present invention;

[0035] Figure 2 This is an isometric view of an underground compressed air storage facility according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the connection between the inner gas storage chamber and the connecting components according to an embodiment of the present invention;

[0037] Figure 4This is a schematic diagram showing the connection between the central gas storage chamber and the connecting components according to an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of the inner gas storage chamber and the central gas storage chamber according to an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the structure of the outer gas storage chamber in an embodiment of the present invention.

[0040] In the diagram: 101, external drainage channel; 102, drainage well; 103, radial waterway; 104, internal drainage channel; 201, outer gas storage chamber; 2011, access section; 2012, structural section; 202, inner gas storage chamber; 203, ladder; 204, central gas storage chamber; 205, inlet and outlet pipes; 3, connecting components; 301, connecting pipe; 302, external connecting pipe; 303, internal connecting pipe; 304, valve; 4, underground rock strata; 501, outer rock strata; 502, cast-in-place layer; 503, filling layer; 504, elastic column; 505, sealing layer. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example:

[0043] like Figure 1-6 As shown, this embodiment provides an underground compressed air storage facility, including a storage system and a drainage system disposed within an underground rock stratum 4. The storage system includes a central storage chamber 204 and inner storage chambers 202 and outer storage chambers 201 arranged layer by layer outward from the central storage chamber 204. The inner and outer storage chambers 202 and 201 are located on a circle centered on the central storage chamber 204, with the radius of the outer storage chamber 201 being larger than the radius of the inner storage chamber. The central storage chamber 204, inner storage chamber 202, and outer storage chamber 201 are sequentially connected by a connecting component 3. The drainage system is located below the storage system and is used to drain groundwater. An inlet / outlet pipe 205 is located at the top of the inner storage chamber 202 and / or the central storage chamber 204, and is used for the inflow and outflow of gas. Adjacent inner gas storage chambers 202 are connected by a connecting component 3.

[0044] The gas storage system is mainly used for gas storage. The outer gas storage chamber 201 surrounds the inner gas storage chamber 202, and the inner gas storage chamber 202 surrounds the central gas storage chamber 204. In this state, the overall structure composed of the outer gas storage chamber 201, the inner gas storage chamber 202, and the central gas storage chamber 204 is stable, which can ensure the stability of the gas storage process. The connecting components 3 should be as short as possible to reduce the construction cost. When air is injected or discharged, the outer gas storage chamber 201, the inner gas storage chamber 202, and the central gas storage chamber 204 can be controlled to open and close each other under the action of the connecting components 3. Each inner gas storage chamber 202 has multiple channels formed by connecting components 3. Therefore, even if the channel of a single connecting component 3 cannot be used, air can be continuously input or output with the help of the channels of other connecting components 3, ensuring the continuous use of air energy. It can be quickly put into use in emergency situations, improving emergency response capabilities and the flexibility of use.

[0045] With the above configuration, in this embodiment, the gas storage cavern is arranged in a circle around the central gas storage cavern 204, with an inner layer of gas storage caverns 202 surrounding it. Outside the inner layer of gas storage caverns 202, an outer layer of gas storage caverns 201 is arranged, forming a three-layered annular gas storage cavern array. In this embodiment, six sets of both the inner and outer layer gas storage caverns 202 are arranged, thus the horizontal cross-section of the central gas storage cavern 204 is a regular hexagon. Six sets of inner layer gas storage caverns 202 are evenly arranged around the central gas storage cavern 204, their horizontal cross-sections also being regular hexagons, forming an inner annular array. Outside the inner array, six sets of outer layer gas storage caverns 201 are evenly arranged, together forming an outer annular array. In this layout, the corners of the outer and inner annular arrays are staggered, forming a stable honeycomb structure, improving overall stability and space utilization. More sets can be set up according to the needs of gas storage, and the shape of the corresponding gas storage chamber can also be adjusted accordingly.

[0046] The six sets of outer gas storage caverns 201 surround the inner gas storage cavern 202. To accommodate the hexagonal honeycomb layout and ensure effective connection between the inner and outer caverns, this embodiment employs an asymmetrical design for the shape of the outer gas storage caverns 201. Specifically, each set of outer gas storage caverns 201 does not adopt a standard regular hexagon, but is designed as an irregular hexagon with a short-side access section 2011 and a long-side structural section 2012. The short-side access section is located inside the outer gas storage cavern 201, with a shorter side length, to adapt to the protruding part of the inner gas storage cavern 202, and connects the two sets of caverns via a connecting component 3. The long-side structural section 2012 constitutes the main side of the outer gas storage cavern 201, and adjacent outer caverns are sequentially connected via their long sides to ensure the overall stability of the surrounding rock structure. Through the above structure, the six sets of outer gas storage chambers 201 enclose and form a double outline: the inner outline is defined by the short side access sections of the six outer gas storage chambers 201, forming a regular hexagonal inner boundary that tightly encloses the six sets of inner gas storage chambers 202. The outer outline is formed by the outer sides of the long side structural sections of the six outer gas storage chambers 201, forming a regular hexagonal outer boundary of the entire gas storage facility. While maintaining the overall regular shape (regular hexagonal), this structural layout, by adjusting the side length ratio of the outer chambers, not only reserves sufficient space to accommodate and connect the inner chambers, but also staggers the connection points (corners) of the inner and outer chambers, providing ample operating space for the installation of the connecting components 3. This achieves efficient utilization of underground space and optimization of structural stress.

[0047] This design forms a regular hexagonal structure and shape that works in conjunction with the inner gas storage chambers, maximizing the use of underground space and improving the aesthetics and stability of the underground gas storage facility. At the same time, the layered and nested arrangement of the central gas storage chamber, the inner gas storage chambers, and the outer gas storage chambers allows for the adaptive adjustment of the number of gas storage chamber layers based on the size of the underground space, thus meeting the needs of underground gas storage facilities of various sizes.

[0048] The central gas storage chamber, inner gas storage chamber, and outer gas storage chamber are all arranged in a regular hexagonal pattern to maximize the use of underground gas storage space. They are also interconnected, so even if any group of chambers stops using, it will not affect the gas storage and retrieval of other chambers, thus improving the operational efficiency of the underground gas storage facility.

[0049] The underground gas storage facility in this embodiment adopts a multi-layered gas storage system consisting of an outer gas storage chamber 201, an inner gas storage chamber 202, a central gas storage chamber 204, and connecting components 3, forming a flexible and reliable gas storage route. Furthermore, if a single connecting component 3 malfunctions, it can continuously provide exhaust or gas storage routes through the channels formed by other connecting components 3, thus possessing high emergency response capabilities and excellent operational flexibility.

[0050] In this embodiment, there may be one or more inlet / outlet pipes 205. For example, an inlet / outlet pipe 205 may be constructed on the top of the central gas storage chamber 204, through which air can be injected or discharged. If the underground environment is highly corrosive or has complex characteristics, at least two inlet / outlet pipes 205 may be used, respectively set on the top of the inner gas storage chamber 202 and the central gas storage chamber 204, to establish multiple air injection and discharge channels and form a flexible usage path. Working principle: When air is injected, external air is injected through the inlet and outlet pipes 205, flowing from the central gas storage chamber 204 to the inner gas storage chamber 202 and then to the outer gas storage chamber 201. Adjacent inner gas storage chambers 202 are interconnected, forming an injection trajectory that gradually expands from the center to the outside. Conversely, when air needs to be discharged, it can be discharged from a single central gas storage chamber 204 through the inlet and outlet pipes 205, or it can be discharged from the central gas storage chamber 204 and at least one outer gas storage chamber 201 or inner gas storage chamber 202 simultaneously, forming a flexible discharge trajectory.

[0051] The connecting assembly 3 includes an outer pipe 302, a connecting pipe 301, and an inner pipe 303 that are detachably connected in sequence. The connecting pipe 301 is provided with a valve 304 for controlling the opening and closing of the connecting pipe 301. The valve 304 is any one of a high-pressure resistant solenoid valve, a high-pressure resistant manual valve, a high-pressure resistant pneumatic valve, or a high-pressure resistant hydraulic valve.

[0052] In this embodiment, the external pipe 302, internal pipe 303, and connecting pipe 301 are connected using a traditional flange connection method, which is simple and reliable, and easy to maintain and repair later. The external pipe 302, internal pipe 303, and connecting pipe 301 form an air circulation channel. The valve 304 can be selected according to the actual situation and investment cost. For example, when an electrical control function is required, a high-pressure resistant solenoid valve can be used to withstand high air pressure.

[0053] Ladders 203 are provided on the inner gas storage chamber 202 and / or the central gas storage chamber 204, and vertical shafts are provided at the ladders 203. Since the entire gas storage facility is located underground, personnel need to go down underground for daily maintenance and inspection. The ladders 203 and vertical shafts provide access for daily maintenance and inspection. The number and location of the ladders 203 and vertical shafts can be reasonably selected according to the actual construction situation.

[0054] The drainage system includes an outer drainage channel 101, a radial waterway 103, and an inner drainage channel 104. The outer drainage channel 101 is arranged around the outer gas storage chamber 201, and the inner drainage channel 104 is arranged around the inner gas storage chamber 202 and the outer gas storage chamber 201. The radial waterway 103 passes through the gap between the outer gas storage chambers 201 and connects the outer drainage channel 101 and the inner drainage channel 104. The radial waterway 103 also extends to the central gas storage chamber 204. A drainage well 102 is also provided in the outer drainage channel 101.

[0055] During drainage, due to the presence of groundwater and rainwater, the remaining water can flow into the outer drainage channel 101 and the inner drainage channel 104 along the rock crevices. The radial waterway 103 connects the outer drainage channel 101 and the inner drainage channel 104. Therefore, even if the inner drainage channel 104 in the center has a large amount of water, it can still be quickly dispersed through the radial waterway 103, forming a good drainage layout. The drainage well 102 is used for drainage.

[0056] The walls of the inner gas storage chamber 202, the outer gas storage chamber 201, and the central gas storage chamber 204 all include a sealing layer 505, a filling layer 503, a casting layer 502, and an outer rock layer 501 arranged sequentially from the inside out.

[0057] The chamber wall, composed of a sealing layer 505, a filling layer 503, a pouring layer 502, and an outer rock layer 501, ensures good airtightness and high pressure resistance for air storage. The elastic column 504 inside the filling layer 503 can provide a certain degree of deformation and buffering capacity in the event of an earthquake or artillery bombardment, ensuring the safety and reliability of the underground gas storage facility.

[0058] The filling layer 503 is filled with elastic columns 504 along the vertical direction. The elastic columns 504 are made of rubber. The casting layer 502 is made of concrete.

[0059] The above description is merely a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, improvements and modifications obtained without departing from the inventive concept should also be considered within the scope of protection of the present invention.

Claims

1. An underground compressed air storage facility, characterized in that, include: An underground gas storage system includes a central gas storage chamber and multiple sets of inner and outer gas storage chambers surrounding the central gas storage chamber. The inner gas storage chambers are located on the side of the outer gas storage chambers closer to the central gas storage chamber. The central gas storage chamber, inner gas storage chambers, and outer gas storage chambers are connected in sequence by connecting components. A drainage system, located below the gas storage system, is used to drain groundwater; Inlet and outlet pipes are located at the top of the inner gas storage chamber and / or the central gas storage chamber for the inflow and outflow of gas. Adjacent inner gas storage chambers are connected by connecting components; The inner gas storage chamber is provided in six groups, and the horizontal cross-sectional shape of both the inner gas storage chamber and the central gas storage chamber is set to a regular hexagon. The outer gas storage chamber is provided in six groups, and the outer sides of the six groups of outer gas storage chambers are arranged in a regular hexagonal pattern. The inner side of each group of outer gas storage caverns is recessed inward to form a receiving cavity for accommodating the inner gas storage caverns, and the inner side of the receiving cavity of each group of outer gas storage caverns is correspondingly connected to a group of inner gas storage caverns. The inner sides of the six outer gas storage chambers are arranged in a regular hexagonal pattern and can surround all the inner gas storage chambers.

2. The underground compressed air storage facility according to claim 1, characterized in that, The connection assembly includes an outer pipe, a connecting pipe, and an inner pipe that are detachably connected in sequence, and the connecting pipe is equipped with a valve for controlling the opening and closing of the connecting pipe.

3. The underground compressed air storage facility according to claim 1, characterized in that, The drainage system includes an external drainage channel, a radial water channel, and an internal drainage channel. The external drainage channel is arranged around the outside of the outer gas storage cavern, and the internal drainage channel is arranged around the space between the inner gas storage cavern and the outer gas storage cavern. The radial water channel passes through the gap between two adjacent outer gas storage caverns and connects the external drainage channel and the internal drainage channel. The radial waterway also extends to the central gas storage chamber.

4. The underground compressed air storage facility according to claim 1, characterized in that, The walls of the inner gas storage cavern, the outer gas storage cavern, and the central gas storage cavern all include a sealing layer, a filling layer, a casting layer, and an outer rock layer arranged sequentially from the inside out. The filling layer is filled with elastic columns along the vertical direction. The elastic columns are made of rubber. The casting layer is made of concrete.

5. The underground compressed air storage facility according to claim 1, characterized in that, The inlet and outlet pipes are installed in multiple sets on the inner gas storage chamber.

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